运用上一节介绍的类加载的过程，介绍一个详细的实例

大家可以根据上一节的介绍尝试运行

package classloader;

class Singleton{

private static Singleton singleton=new Singleton();

public static int counter1;

public static int counter2=0;

private Singleton(){

counter1++;

counter2++;

}

public static Singleton getInstance(){

return singleton;

}

}

public class TestClass {

/**

* @param args

*/

public static void main(String[] args) {

Singleton sin=Singleton.getInstance();

System.out.println("counter1 = "+sin.counter1);

System.out.println("counter2 = "+sin.counter2);

}

}

counter1 = 1

counter2 = 0

package classloader;

class Singleton{

public static int counter1;

public static int counter2=0;

private static Singleton singleton=new Singleton();

private Singleton(){

counter1++;

counter2++;

}

public static Singleton getInstance(){

return singleton;

}

}

public class TestClass {

/**

* @param args

*/

public static void main(String[] args) {

Singleton sin=Singleton.getInstance();

System.out.println("counter1 = "+sin.counter1);

System.out.println("counter2 = "+sin.counter2);

}

}

counter1 = 1

counter2 = 1